The article makes it sound as if the problem only arises due to other nearby phones. The test using 2 phones was only intended to prove that the problem can ALSO be triggered by an externally generated signal, even while the phone is in the bootloader, thereby isolating it from Android OS proper, and increasing the likelihood of it being a hardware problem. The Galaxy Nexus' own radio can also trigger the same problem if you use it in 2G mode on 900MHz, without needing any other phones nearby.